How do I Find High Paying Keywords for Adsense?

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How can I find a well paid keywords to use on my site? I'm starting from the begining and I would like to make articles that will get me well paid ads.
I've tried Overture's Bid Tool but it doesn't work, I enter my keyword and the code but it doesn't show anything.

I've found top keywords for 7search, can I use them?

I have also found a free list on www.toppayingkeywords.be but I would like to check them first before I use them but I don't know where to check them since overture's tool doesn't work.